Electrodynamic Characteristics and Diagnostics of Dense Plasma

Abstract

Abstract In this work, a model two-component dense plasma is considered within the framework of a self-consistent five-moment approach in the quasi-classical approximation. The proposed calculation method is distinguished by the absence of fitting parameters and requires only knowledge of plasma parameters for calculations. The electrodynamic characteristics of the system were calculated and investigated. The obtained results are compared with data found by other authors using molecular dynamics simulations.

The static characteristics of this system were found from the solution of the Ornstein-Zernike equation in the hyperchain approximation using the Deutsch pseudopotential, which behaves like the Coulomb potential at large distances and is finite at small distances, since it takes into account the quantum properties of particles.

A distinctive feature of the moment method calculations is the necessity of determining the so-called Nevanlinna parameter function, which is included in the computational relations. In this study, this function depends only on the ratio of moments of different orders.

The dispersion and damping decrement of plasma waves were determined by solving the dispersion equation using the moment method and comparing it with numerical experiments. Additionally, a method for approximate plasma temperature diagnostics is proposed.

Keywords: two-component plasma, moment method, Nevanlinna parameter function, dynamic structure factor, plasma diagnostics, plasma wave dispersion, plasma wave damping decrement.